Leases - Narrative (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Apr. 30, 2020	Apr. 30, 2020
Lessee, Lease, Description [Line Items]
Lease, Cost	$ 25.8	$ 53.6
Operating lease, cost	24.6	51.2
Finance lease, cost	$ 1.2	$ 2.4
Minimum
Lessee, Lease, Description [Line Items]
Lease term		1 year
Maximum
Lessee, Lease, Description [Line Items]
Lease term		30 years